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G.711 audio: PCMU and PCMA in a SIP setup

Updated 2026-10-30 · Prepared by Call Global Communications Inc

Short answer: G.711 is a common telephone audio codec with µ-law and A-law variants, often shown as PCMU and PCMA. The two endpoints must negotiate a compatible audio format.

When configuring a supported CallGlobal SIP client, retain the appropriate G.711 options. An incompatible codec selection can stop media even after call signaling succeeds.

Use the definition to check your setup

G.711 is a common telephone audio codec with µ-law and A-law variants, often shown as PCMU and PCMA. The two endpoints must negotiate a compatible audio format.

When configuring a supported CallGlobal SIP client, retain the appropriate G.711 options. An incompatible codec selection can stop media even after call signaling succeeds.

G.711 audio: PCMU and PCMA in a SIP setup — points to check

Review pointCallGlobal guidance
ConceptG.711 is a common telephone audio codec with µ-law and A-law variants, often shown as PCMU and PCMA. The two endpoints must negotiate a compatible audio format.
Configuration implicationWhen configuring a supported CallGlobal SIP client, retain the appropriate G.711 options. An incompatible codec selection can stop media even after call signaling succeeds.
Product boundaryConsult the feature list; a glossary term does not identify an included capability.

Where the CallGlobal line fits

Your number account provides the public telephone identity, its communication controls and the SIP credentials for compatible software. Other capabilities belong to the application or phone system you choose.

Review the live product feature list before relying on an additional function. Number porting, hosted IVR, voicemail, call recording and a public customer API are not included.

Protect the line and the account

  • Keep account and SIP passwords private, including in support screenshots.
  • Confirm the active rental term before relying on incoming communication.
  • Use the complete international number and only an authorized caller identity.

Frequently asked questions

What does this term describe?

G.711 is a common telephone audio codec with µ-law and A-law variants, often shown as PCMU and PCMA. The two endpoints must negotiate a compatible audio format.

How does this affect practical configuration?

When configuring a supported CallGlobal SIP client, retain the appropriate G.711 options. An incompatible codec selection can stop media even after call signaling succeeds.

Does every telephone concept name an included product feature?

No. A glossary explains terminology. The product feature page and your number dashboard identify the functions provided with a CallGlobal line.

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